摘要
采用不同浓度的臭椿根水浸提液对刺槐幼苗进行浇灌处理,对刺槐幼苗的形态指标、生物量指标进行测定,探讨臭椿根提液对刺槐幼苗生长的化感作用。结果表明:臭椿根的水提液处理抑制刺槐幼苗的苗高生长,浸提液浓度越大,抑制作用越强,浸提液浓度为1∶3的原液处理的苗高增长量仅为CK的43.5%;叶片叶绿素含量与对照相比略有降低,单株叶量减少,幼苗整株生物量减小。根提液处理浓度越大,对幼苗生长的抑制作用越强。因此,臭椿根的水提液对刺槐幼苗具抑制生长的化感效应,其中对其苗高生长与生物量的化感作用最强,且具有明显的浓度效应。
With different water extract concentrations from root of Ailanthus altissirna to treat Robinia pseudoacacia seedlings, and testing seedlings＇ morphological and biomass indices, the paper studied the allelopathic effect of the extracts on the seedlings. The results showed that when treated by water extracts from the root of Ailanthus altissirna, the seedlings＇ height growth of Robinia pseudoacacia was inhibited, and the inhibiting effects gradually increased with the increasing of leaching solution concentration. When treated with a concentration of 1 ： 3, the net increase in seedling height was only 43.5 G of the net growth of the control group. Compared to the control group, leaf chlorophyll contents and whole individual biomass of the treated group of Robinia pseudoacacia seedlings were reduced. All.these indicated that water extracts from the root of Ailanthus altissima had special allelo- pathic effects on seedling growth of Robinia pseudoacacia, and inhibiting effects on the seedling growth and biomass were stronger than that of leaf chlorophyll content and leaf quantity per plant, but the effect intensity was different when treated by different leaching solution concentrations.
出处
《西北农业学报》
CAS
CSCD
北大核心
2009年第3期156-159,180,共5页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家自然科学基金资助项目(30460110)
关键词
臭椿
刺槐
化感作用
Ailanthus altissima Swingle Robinia pseudoacacia L.
Allelopathy
